I've been leveling animal handling with archery for the hell of it because I'm bored and this is one skill I will not use because of the abysmal drop rate on anchor runes. Its just not worth it to me. I also think the anchor runes are consumed when you use the ability once which means you'd literally need to farm hundreds of hours for a decent stack size to make it worth using on any given foray.

This ability and these drop rates need to be re-visited in my opinion. I'm surprised as to how rare the drop is. Its almost like hunting for magic sand or explosive rune stones or enchanted mistletoes but instead of unlocking new abilities permanently upon usage, with anchor runes you use an ability one time in one instance of combat and consume that stone forever never to be of use again.